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Colm O’Morain

Active 1980–2025

Also published as
Colm O’Moráin
100
Papers
30,967
Citations
76
h-index
99
i10-index

Citations

Citations per year for Colm O’Morain1970: 1 citations1983: 2 citations1984: 3 citations1985: 8 citations1986: 4 citations1987: 10 citations1988: 14 citations1989: 17 citations1990: 25 citations1991: 24 citations1992: 24 citations1993: 21 citations1994: 19 citations1995: 14 citations1996: 24 citations1997: 35 citations1998: 47 citations1999: 87 citations2000: 134 citations2001: 129 citations2002: 227 citations2003: 228 citations2004: 227 citations2005: 225 citations2006: 255 citations2007: 230 citations2008: 176 citations2009: 216 citations2010: 187 citations2011: 207 citations2012: 166 citations2013: 256 citations2014: 256 citations2015: 245 citations2016: 226 citations2017: 200 citations2018: 190 citations2019: 610 citations2020: 683 citations2021: 550 citations2022: 453 citations2023: 458 citations2024: 718 citations2025: 390 citations2026: 13 citations1971–1982: no citations, so these years are not shown

Citation sources

Countries

World map of the countries and regions citing this authorUnited States: 2,114 citing papers, 17.8% of this breakdownChina: 1,000 citing papers, 8.4% of this breakdownUnited Kingdom: 926 citing papers, 7.8% of this breakdownItaly: 689 citing papers, 5.8% of this breakdownGermany: 615 citing papers, 5.2% of this breakdownFrance: 615 citing papers, 5.2% of this breakdownCanada: 486 citing papers, 4.1% of this breakdownJapan: 411 citing papers, 3.4% of this breakdownSpain: 356 citing papers, 3% of this breakdownNetherlands: 344 citing papers, 2.9% of this breakdownAustralia: 289 citing papers, 2.4% of this breakdownBelgium: 258 citing papers, 2.2% of this breakdown
0%17.8%Other 31.8%

Institutions

Fields

  • Medicine55.3%
  • Biochemistry, Genetics and Molecular Biology33%
  • Immunology and Microbiology7.3%
  • Agricultural and Biological Sciences0.9%
  • Nursing0.7%
  • Neuroscience0.6%
  • Other2.2%

Topics

  • Helicobacter pylori-related gastroenterology studies13.9%
  • Inflammatory Bowel Disease9.5%
  • Microscopic Colitis5%
  • Clostridium difficile and Clostridium perfringens research3.7%
  • Gastric Cancer Management and Outcomes3.5%
  • Gut microbiota and health3.3%
  • Other61.1%

Coauthors

All papers

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  1. Management of Helicobacter pylori infection: the Maastricht VI/Florence consensus report

    Authors: Peter Malfertheiner, Françis Mégraud, Theodore Rokkas, Javier P. Gisbert, Jyh‐Ming Liou, Christian Schulz, Antonio Gasbarrini, Richard H. Hunt, Mārcis Leja, Colm O’Morain, Massimo Rugge, Sebastian Suerbaum, Herbert Tilg, Kentaro Sugano, Emad El‐Omar - Gut 2022 cited by 1,352

  2. Management of Helicobacter pylori infection—the Maastricht V/Florence Consensus Report

    Authors: Peter Malfertheiner, Françis Mégraud, Colm O’Morain, Javier P. Gisbert, Ernst J. Kuipers, Anthony Axon, Franco Bazzoli, Antonio Gasbarrini, J. Atherton, David Y. Graham, Richard H. Hunt, Paul Moayyedi, Theodore Rokkas, Massimo Rugge, Michael Selgrad, Sebastian Suerbaum, Kentaro Sugano, Emad El‐Omar - Gut 2016 cited by 2,924

  3. Global Prevalence of Helicobacter pylori Infection and Incidence of Gastric Cancer Between 1980 and 2022

    Authors: Yi‐Chu Chen, Peter Malfertheiner, Hao-Ting Yu, Chih-Lin Kuo, Yung-Yueh Chang, Fan-Tsui Meng, Yu-Xuan Wu, Juo-Lun Hsiao, Mei‐Jyh Chen, Kun‐Pei Lin, Chun‐Ying Wu, Jaw‐Town Lin, Colm O’Moráin, Françis Mégraud, Wen‐Chung Lee, Emad El‐Omar, Ming‐Shiang Wu, Jyh‐Ming Liou - Gastroenterology 2024 cited by 453

  4. Association of NOD2 leucine-rich repeat variants with susceptibility to Crohn's disease

    Authors: Jean‐Pierre Hugot, Mathias Chamaillard, Habib Zouali, Suzanne Lesage, Jean‐Pierre Cézard, Jacques Bélaïche, Sven Almér, Curt Tysk, Colm O’Morain, Miquel A. Gassull, Vibeke Binder, Yigael Finkel, Antoine Cortot, R Modigliani, Pierre Laurent‐Puig, Corinne Gower‐Rousseau, J. Macry, Jean–Frédéric Colombel, Mourad Sahbatou, Gilles Thomas - Nature 2001 cited by 5,606

  5. Management of Helicobacter pylori infection—the Maastricht IV/ Florence Consensus Report

    Authors: Peter Malfertheiner, Françis Mégraud, Colm O’Morain, J. Atherton, Anthony Axon, Franco Bazzoli, Gian Franco Gensini, Javier P. Gisbert, David Y. Graham, Theodore Rokkas, Emad El‐Omar, Ernst J. Kuipers, The European Helicobacter Study Group (EHSG) - Gut 2012 cited by 2,259

  6. Comparative Effectiveness of Multiple Different First-Line Treatment Regimens for Helicobacter pylori Infection: A Network Meta-analysis

    Authors: Theodore Rokkas, Javier P. Gisbert, Peter Malfertheiner, Yaron Niv, Antonio Gasbarrini, Mārcis Leja, Françis Mégraud, Colm O’Morain, David Y. Graham - Gastroenterology 2021 cited by 181

  7. Difficult-to-treat inflammatory bowel disease: results from an international consensus meeting

    Authors: Tommaso Lorenzo Parigi, Ferdinando D’Amico, María T. Abreu, Axel Dignaß, Iris Dotan, Fernando Magro, Anne M. Griffiths, Vipul Jairath, Marietta Iacucci, Gerassimos J. Mantzaris, Colm O’Morain, Walter Reinisch, David B. Sachar, Dan Turner, Takayuki Yamamoto, David T. Rubin, Laurent Peyrin‐Biroulet, Subrata Ghosh, Silvio Danese - ˜The œLancet. Gastroenterology & hepatology 2023 cited by 120

  8. Geographical variability and environmental risk factors in inflammatory bowel disease

    Authors: Siew C. Ng, Çharles N. Bernstein, Morten H. Vatn, Péter L. Lakatos, Edward V. Loftus, Curt Tysk, Colm O’Morain, Bjørn Moum, Jean‐Frédéric Colombel - Gut 2013 cited by 589

  9. Selecting End Points for Disease-Modification Trials in Inflammatory Bowel Disease: the SPIRIT Consensus From the IOIBD

    Authors: Catherine Le Berre, Laurent Peyrin‐Biroulet, William J. Sandborn, Jean–Frédéric Colombel, David T. Rubin, Yehuda Chowers, Walter Reinisch, Stefan Schreiber, Matthieu Allez, Geert D’Haens, Subrata Ghosh, Ioannis E. Κoutroubakis, Peter G. Gibson, Jonas Halfvarson, Ailsa Hart, Arthur Kaser, Pia Munkholm, Wolfgang Kruis, Séverine Vermeire, Edward V. Loftus, Milan Lukáš, Gerassimos J. Mantzaris, Colm O’Morain, Julián Panés, Gerhard Rogler, Antonino Spinelli, Bruce E. Sands, Aswhin N. Ananthakrishnan, Siew C. Ng, David B. Sachar, Simon Travis, Flávio Steinwurz, Dan Turner, Parambir S. Dulai, Vipul Jairath, Iris Dotan, María T. Abreu, Remo Panaccione, Silvio Danese - Gastroenterology 2021 cited by 165

  10. Antibiotic Resistance Prevalence and Trends in Patients Infected with Helicobacter pylori in the Period 2013–2020: Results of the European Registry on H. pylori Management (Hp-EuReg)

    Authors: Luís Bujanda, Olga P. Nyssen, Dino Vaira, Ilaria Maria Saracino, Giulia Fiorini, Frode Lerang, Sotirios D. Georgopoulos, Bojan Tepeš, Frédéric Heluwaert, Antonio Gasbarrini, Theodore Rokkas, Д.С. Бордин, Sinéad M. Smith, Vincent Lamy, María Caldas, Elena Resina, Raquel Muñoz-González, Ángel Cosme, Ignasi Puig, Françis Mégraud, Colm O’Morain, Javier P. Gisbert, on behalf of the Hp-EuReg Investigators - Antibiotics 2021 cited by 111

  11. United European Gastroenterology (UEG) and European Society for Neurogastroenterology and Motility (ESNM) consensus on functional dyspepsia

    Authors: Lucas Wauters, Ram Dickman, Vasile Drug, Agata Mulak, Jordi Serra, Paul Enck, Jan Tack, ESNM FD Consensus Group, Anna Accarino, Giovanni Barbara, Serhat Bor, Benoît Coffin, Maura Corsetti, Heiko U. De Schepper, Dan L. Dumitraşcu, Adam D. Farmer, Guillaume Gourcerol, Goran Hauser, Trygve Hausken, George Karamanolis, Dániel Keszthelyi, Carolina Malagelada, Tomislav Milosavljevic, Jean Muris, Colm O’Morain, Athanassos Papathanasopoulos, Daniel Pohl, D. E. Rumyantseva, Giovanni Sarnelli, Edoardo Savarino, Jolien Schol, Arkady Sheptulin, Annemieke Smet, Andreas Stengel, О. А. Сторонова, Martin Storr, Hans Törnblom, Tim Vanuytsel, Mónica Velosa, Marek Waluga, Natalia Zárate, Frank Zerbib - Neurogastroenterology & Motility 2021 cited by 160

  12. Management of precancerous conditions and lesions in the stomach (MAPS): guideline from the European Society of Gastrointestinal Endoscopy (ESGE), European Helicobacter Study Group (EHSG), European Society of Pathology (ESP), and the Sociedade Portuguesa de Endoscopia Digestiva (SPED)

    Authors: Mário Dinis‐Ribeiro, Miguel Areia, Annemarie de Vries, Ricardo Marcos‐Pinto, Matilde Monteiro‐Soares, Anthony O’Connor, Carina Pereira, Pedro Pimentel‐Nunes, R. Correia, Arzu Ensarı, Jean‐Marc Dumonceau, José Carlos Machado, Guilherme Macedo, Peter Malfertheiner, Tamara Matysiak‐Budnik, Françis Mégraud, Kazumasa Miki, Colm O’Morain, Richard M. Peek, Thierry Ponchon, Ari Ristimäki, Björn Rembacken, Fátima Carneiro, E.J. Kuipers - Endoscopy 2011 cited by 678

  13. The second European evidence-based Consensus on the diagnosis and management of Crohn's disease: Current management

    Authors: Axel Dignaß, Gert Van Assche, James O. Lindsay, Marc Lémann, Johan D. Söderholm, Jean‐Frédéric Colombel, Silvio Danese, A. D’Hoore, M.À. Gassull, Fernando Gomollón, Daan W. Hommes, Pierre Michetti, Colm O’Morain, Tom Öresland, Alastair Windsor, Eduard F. Stange, Simon Travis - Journal of Crohn s and Colitis 2010 cited by 1,493

  14. High prevalence of overweight and obesity in adults with Crohn's disease: Associations with disease and lifestyle factors

    Authors: Treasa Nic Suibhne, Tara Raftery, Orla McMahon, Cathal Walsh, Colm O’Morain, Maria OʼSullivan - Journal of Crohn s and Colitis 2012 cited by 159

  15. Development of an index to define overall disease severity in IBD

    Authors: Corey A. Siegel, Cynthia B. Whitman, Brennan Spiegel, Brian G. Feagan, Bruce E. Sands, Edward V. Loftus, Remo Panaccione, Geert D’Haens, Çharles N. Bernstein, Richard B. Gearry, Siew C. Ng, Gerassimos J. Mantzaris, Balfour R. Sartor, Mark S. Silverberg, Robert H. Riddell, Ioannis E. Κoutroubakis, Colm O’Morain, Péter L. Lakatos, Dermot McGovern, Jonas Halfvarson, Walter Reinisch, Gerhard Rogler, Wolfgang Kruis, Curt Tysk, Stefan Schreiber, Silvio Danese, William J. Sandborn, Anne M. Griffiths, Bjørn Moum, Christoph Gasché, Francesco Pallone, Simon Travis, Julián Panés, Jean‐Frédéric Colombel, Stephen B. Hanauer, Laurent Peyrin‐Biroulet - Gut 2016 cited by 151

  16. E-health empowers patients with ulcerative colitis: a randomised controlled trial of the web-guided ‘Constant-care’ approach

    Authors: Margarita Elkjær, M. Shuhaibar, Johan Burisch, Yvonne Bailey, Hanne Scherfig, B Laugesen, Søren Avnstrøm, Ebbe Langholz, Colm O’Morain, Elsebeth Lynge, Pia Munkholm - Gut 2010 cited by 313

  17. European Registry on Helicobacter pylori management: Single‐capsule bismuth quadruple therapy is effective in real‐world clinical practice

    Authors: Olga P. Nyssen, Ángeles Pérez‐Aísa, Manuel Castro‐Fernández, Rinaldo Pellicano, José María Huguet, Luı́s Rodrigo, Juan Ortuñ, o, Blas José Gómez-Rodríguez, Ricardo Marcos Pinto, Miguel Areia, Mónica Perona, Óscar Núñez, Marco Romano, Antonietta Gerarda Gravina, Liliana Pozzati, Miguel Fernández‐Bermejo, Marino Venerito, Peter Malfertheiner, Luis Fernanadez‐Salazar, Antonio Gasbarrini, Dino Vaira, Ignasi Puig, Françis Mégraud, Colm O’Morain, Javier P. Gisbert, The Hp‐EuReg investigators - United European Gastroenterology Journal 2020 cited by 71

  18. Population screening and treatment of Helicobacter pylori infection

    Authors: Anthony O’Connor, Colm O’Morain, Alexander C. Ford - Nature Reviews Gastroenterology & Hepatology 2017 cited by 182

  19. Combination of Bismuth and Standard Triple Therapy Eradicates Helicobacter pylori Infection in More than 90% of Patients

    Authors: Adrián G. McNicholl, Д.С. Бордин, Alfredo J. Lucendo, Galina Fadeenko, Manuel Castro‐Fernández, Irina Voynovan, Natalia Valerievna Zakharova, А. С. Сарсенбаева, Luís Bujanda, Ángeles Pérez‐Aísa, Л. Г. Вологжанина, O V Zaytsev, Tatiana Ilchishina, Cristóbal de la Coba Ortiz, Jorge Pérez Lasala, С. А. Алексеенко, Inés Modolell, Javier Molina‐Infante, Rafael Ruíz-Zorrilla López, Horacio Alonso‐Galán, Nuria Fernández Moreno, Jen Hinojosa, Inmaculada Santaella, Pilar Varela, Pedro L. Gonzalez-Cordero, Jésus Barrio, José Luis Domínguez-Jiménez, Óscar Núñez, Javier Alcedo, Olga P. Nyssen, María Caldas, María G. Donday, Oleg Shvetz, Françis Mégraud, Colm O’Morain, Javier P. Gisbert - Clinical Gastroenterology and Hepatology 2019 cited by 94

  20. Protocol of the European Registry on the management of Helicobacter pylori infection (Hp‐EuReg)

    Authors: Adrián G. McNicholl, Colm O’Morain, Françis Mégraud, Javier P. Gisbert - Helicobacter 2019 cited by 80

  21. CARD15/NOD2 Mutational Analysis and Genotype-Phenotype Correlation in 612 Patients with Inflammatory Bowel Disease

    Authors: Suzanne Lesage, Habib Zouali, Jean‐Pierre Cézard, Jean‐Frédéric Colombel, Jacques Bélaïche, Sven Almér, Curt Tysk, Colm O’Morain, Miquel A. Gassull, Vibeke Binder, Yigael Finkel, R Modigliani, Corinne Gower‐Rousseau, J. Macry, Françoise Merlin, Mathias Chamaillard, Anne‐Sophie Jannot, Gilles Thomas, Jean‐Pierre Hugot - The American Journal of Human Genetics 2002 cited by 990

  22. Review: Improving compliance with Helicobacter pylori eradication therapy: when and how?

    Authors: John O’Connor, Ikue Taneike, Colm O’Morain - Therapeutic Advances in Gastroenterology 2009 cited by 99

  23. A network meta‐analysis of randomized controlled trials exploring the role of fecal microbiota transplantation in recurrent Clostridium difficile infection

    Authors: Theodore Rokkas, Javier P. Gisbert, Antonio Gasbarrini, Georgina L. Hold, Herbert Tilg, Peter Malfertheiner, Françis Mégraud, Colm O’Morain - United European Gastroenterology Journal 2019 cited by 76

  24. An efficient strategy for evaluating new non-invasive screening tests for colorectal cancer: the guiding principles

    Authors: Robert S. Bresalier, Carlo Senore, Graeme P. Young, James E. Allison, Robert Benamouzig, Sally C. Benton, Patrick M. Bossuyt, Luis Caro, Beatriz Carvalho, Han‐Mo Chiu, Veerle M.H. Coupé, Willemijn de Klaver, Clasine M. de Klerk, Evelien Dekker, Sunil Dolwani, Callum G. Fraser, William M. Grady, Lydia Guittet, Samir Gupta, Stephen P Halloran, Ulrike Haug, Geir Hoff, Steven H. Itzkowitz, Tim Kortlever, Anastasios Koulaouzidis, Uri Ladabaum, Béatrice Secretan, Mārcis Leja, Bernard Levin, Theodore R. Levin, Finlay Macrae, Gerrit A. Meijer, Joshua Melson, Colm O’Morain, Susan Parry, Linda Rabeneck, David F. Ransohoff, Roque Sáenz, Hiroshi Saito, Silvia Sanduleanu‐Dascalescu, Robert E. Schoen, Kevin Selby, Harminder Singh, R. Steele, Joseph J.�Y. Sung, Erin L. Symonds, Sidney J. Winawer - Gut 2023 cited by 49